252043666 has 16 divisors (see below), whose sum is σ = 457491456. Its totient is φ = 101664576.

The previous prime is 252043663. The next prime is 252043679. The reversal of 252043666 is 666340252.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (252043663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529266 + ... + 529741.

It is an arithmetic number, because the mean of its divisors is an integer number (28593216).

Almost surely, 2^252043666 is an apocalyptic number.

252043666 is a deficient number, since it is larger than the sum of its proper divisors (205447790).

252043666 is a wasteful number, since it uses less digits than its factorization.

252043666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059033.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 252043666 is about 15875.8831565365. The cubic root of 252043666 is about 631.6724404838.

The spelling of 252043666 in words is "two hundred fifty-two million, forty-three thousand, six hundred sixty-six".